Used ?! UGHHHH!!!??!!!?

i feel like im being used in a way. i drive, so two of my friends are asking me to take them places and what not, and be part of their date. a guess what you call "the third wheel". i just feel that they are suing me for the car. like the freind that is girl told me" oh i just started tlaking to you because you are gay" and my other firend ive known him since 6th grade but we ad a bit of a rowdy path. what shoudl i tell them. im supposed to take them next week to the movies but i dont really want to be in the middle of what they do...